Rendering apparatus.



C. E. A. WANNENWETSCH RENDERING APPARATUS.

APPLIOATION FILED MARA, 1907; *Y

Patented oct. 18,191@

Z BEBETS-SEEET l.

M zam C. A. WANNENWETSCH.

RENDERING APPARATUS.

`.f xPPLoATIoN FILED mn. 4, 1907.

Patented 00u18, 1910.

2 SHEETS-SHEET 2.

srA-rns ATENT FFCE.

. CHARLES H. A.. WANNENWETSCH, F BUFFALO, NEW YORK, ASSIGNOR OF ONE-HALF TO ALBERT C. LEMBKE, OF BUFFALO, NEW YORK.

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RENDERING APPARATUS.

To all whom it may concern;

Be it known that I, CHARLES H. A. WAN- NENwnfrsoH, a citizen of the United States A residing at Buffalo, in the county of Erie and State of New York, have invented a ,l 'new and useful Improvementin Rendering Apparatus, of which the following is a specification.

'This invention" relates to an apparatus for rendering animal matter and has the object to produce an apparatus forv this purpose which enables the rendering process to be conducted sanitarily and oderlessly and extract "therefrom -the maximum amount of gas or vapor utilizable as fuel, and separating therefrom all the commercially valuable fat, grease and also converting the residue into a vcondition best suitable for fertilizer. An apparatus of this. character is shown and described in Letters Patent of the United 'States No.735,987 granted to F. Kleinmodification of a rendering apparatus con' structed in accordance with my invention. Fig. 4 is an enlarged fragmentary vertical section of the condenser and vacuum producer shown in the last mentioned construction.

Similar letters of reference indicate corresponding parts throughout the several views.

The tank A which receives the material to 'be treated is arranged upright and provided in its top with an inlet opening b for the introduction of the material to be treated and in its side near its lower end with an outlet opening b1 for the removal of the dried residue, said openings being closed by covers or doors 13,131 while the apparatus is in operation. After a batch of material is placed in the tank the same is thoroughly heated and cookedby means of steam which is conducted into the tank through pipes C or grease is withdrawn through a pipe D ar- Specication of Letters `Patent.

Application led March 4, 1907'.v

serial No. 360.325.

ranged about midway of the height of the tank and containing a valve d. The fat or means of water conducted into the lower part ofthe tank by a pipe E containing a valve e, the supplyl of water being so regulated as to keep pace with the discharge of fat, thereby enabling all the fat or grease to be removed through the one discharge 1 e. P llt has been found in practice that the grease sometimes does not flow readily from the top of the liquid laterally toward the draw oif valve d particularly when the grease contains large solid pieces. To overcome this difficulty a nozzle e1 is arranged in the tank diametrically opposite the pipe D. and below the normal liquid level in the tank and connected with the supply pipe E by a pipe e2 containing a valve e or with some other liquid or steam supply. Upon drawing off the grease the valve e3 is opened so that a jet ofwater or other agent is directed into the body of grease toward said discharge pipe D whereby a transverse ow or current of grease toward the .draw-off pipe is produced and its discharge through the latter is facilitated.

Before the fat or grease is removed, the steam supply to the interior of the tank is out olf and after the grease is removed the contents-of the tank are dried by applying heat to the exterior of the tank. This is preferably effected by a lower steam Vjacket F arranged underneath the tank and a side steam jacket F1 surrounding the lower part ofthe tank, steam being supplied to these jackets by pipes f, f1 containing valves f2, f3. By extending the side steam jacket only around the lower part of the tank the steam is concentrated upon the charge which 'occupies this part of the tank, thereby economizing in the use of steam. After the residue in the tank is thoroughly dry, the steam is turned off from the jackets and when sufciently cool the same is removed from the tank through its discharge opening b1.

lVithin the lower part of the tank is arranged the agitator which disintegrates the material during the cooking operation for exposing all parts to the action of the heat and effectually separatin the fat matters contained in the tissues o the material un- Patented Oct. 18, 1910.

grease is raised to the draw-off pipe D by A der treatment, which stirs up the material is arranged close to the inner side or.

so as to facilitate the drying of the solid residue after the same has been cooked and the fat or grease has been drawn off 'and which discharges the material after being dried through the outlet opening normally closed by the door B1. *This agitator consists of a pair of horizontal rotatable arms G arranged diametrically on the upper end of a vertical shaft H and a' plurality of teeth I, Il projecting upwardly from said arms. Each of the teeth ismade of angular form preferably from short sections of angle iron which are secured to the upper sides ofsaid arms so that the upper flange z' of each tooth is arranged vertically and the lower flange l projects horizontally inward from the lower edge of the vertical flange, as shown in Fig. 1. The teeth arealso so arranged that they travel in dierent circular paths and some trend outwardly while others trend inwardly relatively to the axis of rotation, thereby bringing all parts of the material under the action of the agitator and thoroughly breaking up the same and liberating the fat therein.

:The outermost tooth I1 of one of the arms G bore of the upright wall of the tank and its rear end is curved or bent inwardly, thereby causing the material lying against the wall of the tank to be constantly moved inwardly by the tooth I1 and thus permit the'heat to penetrate and reach all parts of the same. The several teeth are attached at their front ends to the arms G while their rear ends trail behind the arms, as shown in Figs. 1 and 2, thereby obtaining a large stirring area without making the arms unduly wide and heavy. Each of the agitator arms is curved so that its front or advancing side is convex and its rear or trailing side is concave. The two arms together are S-shaped, as shown in FigfQ, anda operate more effectuall as conveyers for discharging the materia after it is dried from the tank through the outlet opening at the bottom.

While the material in the tank is being cooked and dried, vapors or gases are given off vfrom the same. These vapors are drawn off through a vapor outlet J arranged at the ltop of the tank and connecting with the front end of a'main vapor or gas conduit or discharge pipe K. This vapor conduit is connected with a device which operates to roduce a vacuum in the tank so as to orcibly withdraw the vapors or gases therefrom, thereby facilitating the cooking and drying process, and it also operates to condense certain vapors or gases so that they can be discharged into a sewer and carried away. Various forms of condensers and vacuum producers may be used for this purpose.

The -condenser and vacuum producer L shown in Fig. 1 is constructed inthe form of a pump, Z being the condensing chamber which connects with the rear end of the main vaporconduit K, M the water inlet pipe entering the condensing chamber,'ml the conical spreader arranged iii the condensing chamber over the outlet of the water pipe, and n the suction pipe of the pump connected with the condensing chamber.

The water from the pipe M, the condensed vapors and the uncondensed vapors are delivered by the discharge pipe nl of the pump latter has` its lower part connected with a liquid drain or discharge pipe 0l while its upper part is connected with a gas or vapgr discharge pipe P containing a valve. The vapors which have been condensed by the pump L pass with the condensing water from the collecting chamber through the A liquid discharge pipe o1 while the uncondensed vapors which are very light and combustible separate from the liquid in the collecting chamber and rise into the upper part of the collecting chamber and are conducted by the pipe P to a furnace or other place where they may be burned or consumed. lThe'liquid outlet of the collecting chamber is preferably somewhat smaller than the discharge pipe of the pump, thereby retarding the escape of the liquid from this chamber and enabling the free or un-V condensed vapor or gas contained in the liquid to bubble upwardly through the 'latter into the upper part of the chamber and be discharged therefrom under pressure, thereby preventing these gases from reaching the sewer. By this means of disposing of the condensable and non-condensable gases, the' aparatus is rendered absolutely odorless and sanitary, enabling the same to be installedin localities where its use otherwise would be prohibited.

In Figs. 3 and 4, the vacuum and condensation is produced by a barometric condenser consisting of an elevated condensing into a collecting chamber O. The

chamber Q having its upper inlet connected y with the tail or rear end of the vapor pipe, a water supply pipe g connected with the side of the condensing chamber, a discharge throat 7' arranged at the lower outlet of the condensing chamber, and a nozzle r1 extending from said vapor pipe K into the' throat. The outlet of the condensing chamber is connected by an upright tail pipe S which o`pens at its lower end into' a collecting chamber s. The latter is provided in its lower part vwith a liquid delivery pipe sp1 and in its upper part with a .gas dellvery pipe s2. As the water supplied from any suitable source enters the condensing chamber through the pipe g andpasses between the nozzle and throat downwardly in the tail pipe, the vapors or gases are Withdrawn'k densing chamber is conducted to the sewer by the pipe .g1 and the uncondensed gases which separatejfrom the liquid and gather in the upper part of this chamber are `carried away bythe `pipe s? and consumed.

While cooking of the material in the tank 'is'v taking place,l the gas or vapor'outlet is restricted and opened only enough toallo'w the gases and vaporsliberated from the ma-v terial to escape and the condensing device isI operated to produce a sufficiently low vacuum to just carry away these gases. During the'cooking-operation the gases or vapors which are ivenL off from the material under treatment are most of' a noncondensable highly explosible and odoriferous character, but during the operation ofdr'ying the residue the 4vapors or gases which are driven oli' from the material` are `mostly of a 20 co'ndensabley character. The -va oror V gas outlet of the tank at thisvtime -1s therefore, opened fully and the condensing device is operated to produce a high vacuum or exhausting` effect roportionately to the inV creaseI in yield ci) vapor.` v- .It has been found impractic'able to employ a single valve for controlling the gas outlet under these different conditions inasmuch as a valve constructed to permit of opening thc. gas outletfully at high vacuum does not permit4 of closely adjusting' this outlet nicely at low `vacuum to produce `the best results.:

`main valve T is closed an In order to meet these differing conditions,

a large main valve T preferably of the gate type'is arranged in the main gas conduit which permits ofA fullyl opening thepsame during the drying operation. A reduced or restricted jby-pass or pipe U is also provided which is connected at opposite ends with the main gas conduit in front-and in rear of themain valve and containsa small auxiliary valve-u. During the cookin operation the the auxiliary valvev u is 4opened just enough to. permit 1. A rendering apparatus comprising Aa i' tank provided at itsl top With` an inlet -for the materialto be treated Vand an outlet for the vapor, on its bottom with' an outlet for the solid residue, and at its sidewith .an outlet A for the grease, a stirrer arranged the` lower part of the tank, and a steam inlet nozzle'arranged in the tank horizontally op :posite the grease outlet.

2. A..rendering apparatus comprising a tank,` an agitatorarranged in the lower part of the tank, a mam vapor delivery pipe con- Iaiected with the top of the tankfan exhausting device connected with the outlet ofthe main vapor pipe, a main valve arranged in the main vapor pipe, acheck valve arranged in the main yvapor pipe in rear of the main valve and adapted to close toward the tank and open away from the tank, afby-pa'ssv pipe connected at its yiront end with the main pipe infront of vthe main ,valve while its rear end is connected with the main pipeon that side of the check valve opposite to the main valve, and 'an auxiliary valve arran ed'in said by-pass pipe, substantially as set orth. A

. CHARLES H. A. WANNENWETSCH.

, Witnesses:

' THEO. L. Pori?,

E. M. GRAHAM.

`-Witness my hand thisQSth day of February, .1907. 3 

